What I recall reading a few years ago is that NASA thought it was a good way to reduce noise.
Some say those silent black helicopters circling overhead use this technology.
Old Thread, see post #8
Fan & Propeller shapes: Sickle and Curved
Quote:
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Trailing Edge Blowing blade with top skin removed. Air enters at the retainer (bottom right) and exits through turning vanes at the trailing edge (left).
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George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
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